Physical downlink control channel candidates aggregated over different numbers of monitoring occasions

ABSTRACT

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of a set of aggregation levels for a set of physical downlink control channel (PDCCH) candidates within a search space. The UE may decode a first subset of PDCCH candidates, of the set of PDCCH candidates, that are each aggregated within a single PDCCH monitoring occasion, and a second subset of PDCCH candidates, of the set of PDCCH candidates, that are each aggregated across multiple PDCCH monitoring occasions. Numerous other aspects are described.

CROSS-REFERENCE TO RELATED APPLICATION

This Patent Application claims priority to Provisional PatentApplication No. 62/705,681, filed on Jul. 10, 2020, entitled “PHYSICALDOWNLINK CONTROL CHANNEL CANDIDATES AGGREGATED OVER DIFFERENT NUMBERS OFMONITORING OCCASIONS,” and assigned to the assignee hereof. Thedisclosure of the prior Application is considered part of and isincorporated by reference in this Patent Application.

FIELD OF THE DISCLOSURE

Aspects of the present disclosure generally relate to wirelesscommunication and to techniques and apparatuses for determining physicaldownlink control channel candidates aggregated over different numbers ofmonitoring occasions.

BACKGROUND

Wireless communication systems are widely deployed to provide varioustelecommunication services such as telephony, video, data, messaging,and broadcasts. Typical wireless communication systems may employmultiple-access technologies capable of supporting communication withmultiple users by sharing available system resources (e.g., bandwidth,transmit power, or the like). Examples of such multiple-accesstechnologies include code division multiple access (CDMA) systems, timedivision multiple access (TDMA) systems, frequency-division multipleaccess (FDMA) systems, orthogonal frequency-division multiple access(OFDMA) systems, single-carrier frequency-division multiple access(SC-FDMA) systems, time division synchronous code division multipleaccess (TD-SCDMA) systems, and Long Term Evolution (LTE).LTE/LTE-Advanced is a set of enhancements to the Universal MobileTelecommunications System (UMTS) mobile standard promulgated by theThird Generation Partnership Project (3GPP).

A wireless network may include a number of base stations (BSs) that cansupport communication for a number of user equipment (UEs). A UE maycommunicate with a BS via the downlink and uplink. “Downlink” (or“forward link”) refers to the communication link from the BS to the UE,and “uplink” (or “reverse link”) refers to the communication link fromthe UE to the BS. As will be described in more detail herein, a BS maybe referred to as a Node B, a gNB, an access point (AP), a radio head, atransmit receive point (TRP), a New Radio (NR) BS, a 5G Node B, or thelike.

The above multiple access technologies have been adopted in varioustelecommunication standards to provide a common protocol that enablesdifferent user equipment to communicate on a municipal, national,regional, and even global level. NR, which may also be referred to as5G, is a set of enhancements to the LTE mobile standard promulgated bythe 3GPP. NR is designed to better support mobile broadband Internetaccess by improving spectral efficiency, lowering costs, improvingservices, making use of new spectrum, and better integrating with otheropen standards using orthogonal frequency division multiplexing (OFDM)with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL), using CP-OFDMand/or SC-FDM (e.g., also known as discrete Fourier transform spreadOFDM (DFT-s-OFDM)) on the uplink (UL), as well as supportingbeamforming, multiple-input multiple-output (MIMO) antenna technology,and carrier aggregation. As the demand for mobile broadband accesscontinues to increase, further improvements in LTE, NR, and other radioaccess technologies remain useful.

SUMMARY

In some aspects, a method of wireless communication performed by a userequipment (UE) includes receiving an indication of a set of aggregationlevels for a set of physical downlink control channel (PDCCH) candidateswithin a search space; and decoding a first subset of PDCCH candidates,of the set of PDCCH candidates, that are each aggregated within a singlePDCCH monitoring occasion, and a second subset of PDCCH candidates, ofthe set of PDCCH candidates, that are each aggregated across multiplePDCCH monitoring occasions.

In some aspects, a method of wireless communication performed by a basestation includes transmitting an indication of a configuration of asearch space having a first subset of PDCCH candidates, that are eachaggregated within a single PDCCH monitoring occasion and a second subsetof PDCCH candidates, that are each aggregated across multiple PDCCHmonitoring occasions; and transmitting a PDCCH communication using aPDCCH candidate of the first subset of PDCCH candidates or the secondsubset of PDCCH candidates.

In some aspects, a UE for wireless communication includes a memory; andone or more processors, coupled to the memory, configured to: receive anindication of a set of aggregation levels for a set of PDCCH candidateswithin a search space; and decode a first subset of PDCCH candidates, ofthe set of PDCCH candidates, that are each aggregated within a singlePDCCH monitoring occasion, and a second subset of PDCCH candidates, ofthe set of PDCCH candidates, that are each aggregated across multiplePDCCH monitoring occasions.

In some aspects, a base station for wireless communication includes amemory; and one or more processors, coupled to the memory, configuredto: transmit an indication of a configuration of a search space having afirst subset of PDCCH candidates, that are each aggregated within asingle PDCCH monitoring occasion and a second subset of PDCCHcandidates, that are each aggregated across multiple PDCCH monitoringoccasions; and transmit a PDCCH communication using a PDCCH candidate ofthe first subset of PDCCH candidates or the second subset of PDCCHcandidates.

In some aspects, a non-transitory computer-readable medium storing a setof instructions for wireless communication includes one or moreinstructions that, when executed by one or more processors of a userequipment UE, cause the UE to: receive an indication of a set ofaggregation levels for a set of PDCCH candidates within a search space;and decode a first subset of PDCCH candidates, of the set of PDCCHcandidates, that are each aggregated within a single PDCCH monitoringoccasion, and a second subset of PDCCH candidates, of the set of PDCCHcandidates, that are each aggregated across multiple PDCCH monitoringoccasions.

In some aspects, a non-transitory computer-readable medium storing a setof instructions for wireless communication includes one or moreinstructions that, when executed by one or more processors of a basestation, cause the base station to: transmit an indication of aconfiguration of a search space having a first subset of PDCCHcandidates, that are each aggregated within a single PDCCH monitoringoccasion and a second subset of PDCCH candidates, that are eachaggregated across multiple PDCCH monitoring occasions; and transmit aPDCCH communication using a PDCCH candidate of the first subset of PDCCHcandidates or the second subset of PDCCH candidates.

In some aspects, an apparatus for wireless communication includes meansfor receiving an indication of a set of aggregation levels for a set ofPDCCH candidates within a search space; and means for decoding a firstsubset of PDCCH candidates, of the set of PDCCH candidates, that areeach aggregated within a single PDCCH monitoring occasion, and a secondsubset of PDCCH candidates, of the set of PDCCH candidates, that areeach aggregated across multiple PDCCH monitoring occasions.

In some aspects, an apparatus for wireless communication includes meansfor transmitting an indication of a configuration of a search spacehaving a first subset of PDCCH candidates, that are each aggregatedwithin a single PDCCH monitoring occasion and a second subset of PDCCHcandidates, that are each aggregated across multiple PDCCH monitoringoccasions; and means for transmitting a PDCCH communication using aPDCCH candidate of the first subset of PDCCH candidates or the secondsubset of PDCCH candidates.

Aspects generally include a method, apparatus, system, computer programproduct, non-transitory computer-readable medium, user equipment, basestation, wireless communication device, and/or processing system assubstantially described herein with reference to and as illustrated bythe drawings and specification.

The foregoing has outlined rather broadly the features and technicaladvantages of examples according to the disclosure in order that thedetailed description that follows may be better understood. Additionalfeatures and advantages will be described hereinafter. The conceptionand specific examples disclosed may be readily utilized as a basis formodifying or designing other structures for carrying out the samepurposes of the present disclosure. Such equivalent constructions do notdepart from the scope of the appended claims. Characteristics of theconcepts disclosed herein, both their organization and method ofoperation, together with associated advantages will be better understoodfrom the following description when considered in connection with theaccompanying figures. Each of the figures is provided for the purposesof illustration and description, and not as a definition of the limitsof the claims.

While aspects are described in the present disclosure by illustration tosome examples, those skilled in the art will understand that suchaspects may be implemented in many different arrangements and scenarios.Techniques described herein may be implemented using different platformtypes, devices, systems, shapes, sizes, and/or packaging arrangements.For example, some aspects may be implemented via integrated chipembodiments or other non-module-component based devices (e.g., end-userdevices, vehicles, communication devices, computing devices, industrialequipment, retail/purchasing devices, medical devices, or artificialintelligence-enabled devices). Aspects may be implemented in chip-levelcomponents, modular components, non-modular components, non-chip-levelcomponents, device-level components, or system-level components. Devicesincorporating described aspects and features may include additionalcomponents and features for implementation and practice of claimed anddescribed aspects. For example, transmission and reception of wirelesssignals may include a number of components for analog and digitalpurposes (e.g., hardware components including antennas, radio frequencychains, power amplifiers, modulators, buffers, processors, interleavers,adders, or summers). It is intended that aspects described herein may bepracticed in a wide variety of devices, components, systems, distributedarrangements, or end-user devices of varying size, shape, andconstitution.

BRIEF DESCRIPTION OF THE DRAWINGS

So that the above-recited features of the present disclosure can beunderstood in detail, a more particular description, briefly summarizedabove, may be had by reference to aspects, some of which are illustratedin the appended drawings. It is to be noted, however, that the appendeddrawings illustrate only certain typical aspects of this disclosure andare therefore not to be considered limiting of its scope, for thedescription may admit to other equally effective aspects. The samereference numbers in different drawings may identify the same or similarelements.

FIG. 1 is a diagram illustrating an example of a wireless network, inaccordance with the present disclosure.

FIG. 2 is a diagram illustrating an example of a base station incommunication with a UE in a wireless network, in accordance with thepresent disclosure.

FIG. 3 is a diagram illustrating an example resource structure forwireless communication, in accordance with the present disclosure, inaccordance with various aspects of the present disclosure.

FIGS. 4 and 5 are diagrams illustrating examples associated withdetermining physical downlink control channel candidates aggregated overdifferent numbers of monitoring occasions, in accordance with thepresent disclosure.

FIGS. 6 and 7 are diagrams illustrating example processes associatedwith determining physical downlink control channel candidates aggregatedover different numbers of monitoring occasions, in accordance with thepresent disclosure.

DETAILED DESCRIPTION

Various aspects of the disclosure are described more fully hereinafterwith reference to the accompanying drawings. This disclosure may,however, be embodied in many different forms and should not be construedas limited to any specific structure or function presented throughoutthis disclosure. Rather, these aspects are provided so that thisdisclosure will be thorough and complete, and will fully convey thescope of the disclosure to those skilled in the art. Based on theteachings herein, one skilled in the art should appreciate that thescope of the disclosure is intended to cover any aspect of thedisclosure disclosed herein, whether implemented independently of orcombined with any other aspect of the disclosure. For example, anapparatus may be implemented or a method may be practiced using anynumber of the aspects set forth herein. In addition, the scope of thedisclosure is intended to cover such an apparatus or method which ispracticed using other structure, functionality, or structure andfunctionality in addition to or other than the various aspects of thedisclosure set forth herein. It should be understood that any aspect ofthe disclosure disclosed herein may be embodied by one or more elementsof a claim.

Several aspects of telecommunication systems will now be presented withreference to various apparatuses and techniques. These apparatuses andtechniques will be described in the following detailed description andillustrated in the accompanying drawings by various blocks, modules,components, circuits, steps, processes, algorithms, or the like(collectively referred to as “elements”). These elements may beimplemented using hardware, software, or combinations thereof. Whethersuch elements are implemented as hardware or software depends upon theparticular application and design constraints imposed on the overallsystem.

It should be noted that while aspects may be described herein usingterminology commonly associated with a 5G or NR radio access technology(RAT), aspects of the present disclosure can be applied to other RATs,such as a 3G RAT, a 4G RAT, and/or a RAT subsequent to 5G (e.g., 6G).

FIG. 1 is a diagram illustrating an example of a wireless network 100,in accordance with the present disclosure. The wireless network 100 maybe or may include elements of a 5G (NR) network and/or an LTE network,among other examples. The wireless network 100 may include a number ofbase stations 110 (shown as BS 110 a, BS 110 b, BS 110 c, and BS 110 d)and other network entities. A base station (BS) is an entity thatcommunicates with user equipment (UEs) and may also be referred to as anNR BS, a Node B, a gNB, a 5G node B (NB), an access point, a transmitreceive point (TRP), or the like. Each BS may provide communicationcoverage for a particular geographic area. In 3GPP, the term “cell” canrefer to a coverage area of a BS and/or a BS subsystem serving thiscoverage area, depending on the context in which the term is used.

A BS may provide communication coverage for a macro cell, a pico cell, afemto cell, and/or another type of cell. A macro cell may cover arelatively large geographic area (e.g., several kilometers in radius)and may allow unrestricted access by UEs with service subscription. Apico cell may cover a relatively small geographic area and may allowunrestricted access by UEs with service subscription. A femto cell maycover a relatively small geographic area (e.g., a home) and may allowrestricted access by UEs having association with the femto cell (e.g.,UEs in a closed subscriber group (CSG)). ABS for a macro cell may bereferred to as a macro BS. ABS for a pico cell may be referred to as apico BS. A BS for a femto cell may be referred to as a femto BS or ahome BS. In the example shown in FIG. 1, a BS 110 a may be a macro BSfor a macro cell 102 a, a BS 110 b may be a pico BS for a pico cell 102b, and a BS 110 c may be a femto BS for a femto cell 102 c. A BS maysupport one or multiple (e.g., three) cells. The terms “eNB”, “basestation”, “NR BS”, “gNB”, “TRP”, “AP”, “node B”, “5G NB”, and “cell” maybe used interchangeably herein.

In some aspects, a cell may not necessarily be stationary, and thegeographic area of the cell may move according to the location of amobile BS. In some aspects, the BSs may be interconnected to one anotherand/or to one or more other BSs or network nodes (not shown) in thewireless network 100 through various types of backhaul interfaces, suchas a direct physical connection or a virtual network, using any suitabletransport network.

Wireless network 100 may also include relay stations. A relay station isan entity that can receive a transmission of data from an upstreamstation (e.g., a BS or a UE) and send a transmission of the data to adownstream station (e.g., a UE or a BS). A relay station may also be aUE that can relay transmissions for other UEs. In the example shown inFIG. 1, a relay BS 110 d may communicate with macro BS 110 a and a UE120 d in order to facilitate communication between BS 110 a and UE 120d. A relay BS may also be referred to as a relay station, a relay basestation, a relay, or the like.

Wireless network 100 may be a heterogeneous network that includes BSs ofdifferent types, such as macro BSs, pico BSs, femto BSs, relay BSs, orthe like. These different types of BSs may have different transmit powerlevels, different coverage areas, and different impacts on interferencein wireless network 100. For example, macro BSs may have a high transmitpower level (e.g., 5 to 40 watts) whereas pico BSs, femto BSs, and relayBSs may have lower transmit power levels (e.g., 0.1 to 2 watts).

A network controller 130 may couple to a set of BSs and may providecoordination and control for these BSs. Network controller 130 maycommunicate with the BSs via a backhaul. The BSs may also communicatewith one another, directly or indirectly, via a wireless or wirelinebackhaul.

UEs 120 (e.g., 120 a, 120 b, 120 c) may be dispersed throughout wirelessnetwork 100, and each UE may be stationary or mobile. A UE may also bereferred to as an access terminal, a terminal, a mobile station, asubscriber unit, a station, or the like. A UE may be a cellular phone(e.g., a smart phone), a personal digital assistant (PDA), a wirelessmodem, a wireless communication device, a handheld device, a laptopcomputer, a cordless phone, a wireless local loop (WLL) station, atablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook,a medical device or equipment, biometric sensors/devices, wearabledevices (smart watches, smart clothing, smart glasses, smart wristbands, smart jewelry (e.g., smart ring, smart bracelet)), anentertainment device (e.g., a music or video device, or a satelliteradio), a vehicular component or sensor, smart meters/sensors,industrial manufacturing equipment, a global positioning system device,or any other suitable device that is configured to communicate via awireless or wired medium.

Some UEs may be considered machine-type communication (MTC) or evolvedor enhanced machine-type communication (eMTC) UEs. MTC and eMTC UEsinclude, for example, robots, drones, remote devices, sensors, meters,monitors, and/or location tags, that may communicate with a basestation, another device (e.g., remote device), or some other entity. Awireless node may provide, for example, connectivity for or to a network(e.g., a wide area network such as Internet or a cellular network) via awired or wireless communication link. Some UEs may be consideredInternet-of-Things (IoT) devices, and/or may be implemented as NB-IoT(narrowband internet of things) devices. Some UEs may be considered aCustomer Premises Equipment (CPE). UE 120 may be included inside ahousing that houses components of UE 120, such as processor componentsand/or memory components. In some aspects, the processor components andthe memory components may be coupled together. For example, theprocessor components (e.g., one or more processors) and the memorycomponents (e.g., a memory) may be operatively coupled, communicativelycoupled, electronically coupled, and/or electrically coupled.

In general, any number of wireless networks may be deployed in a givengeographic area. Each wireless network may support a particular RAT andmay operate on one or more frequencies. A RAT may also be referred to asa radio technology, an air interface, or the like. A frequency may alsobe referred to as a carrier, a frequency channel, or the like. Eachfrequency may support a single RAT in a given geographic area in orderto avoid interference between wireless networks of different RATs. Insome cases, NR or 5G RAT networks may be deployed.

In some aspects, two or more UEs 120 (e.g., shown as UE 120 a and UE 120e) may communicate directly using one or more sidelink channels (e.g.,without using a base station 110 as an intermediary to communicate withone another). For example, the UEs 120 may communicate usingpeer-to-peer (P2P) communications, device-to-device (D2D)communications, a vehicle-to-everything (V2X) protocol (e.g., which mayinclude a vehicle-to-vehicle (V2V) protocol or avehicle-to-infrastructure (V2I) protocol), and/or a mesh network. Inthis case, the UE 120 may perform scheduling operations, resourceselection operations, and/or other operations described elsewhere hereinas being performed by the base station 110.

Devices of wireless network 100 may communicate using theelectromagnetic spectrum, which may be subdivided based on frequency orwavelength into various classes, bands, channels, or the like. Forexample, devices of wireless network 100 may communicate using anoperating band having a first frequency range (FR1), which may span from410 MHz to 7.125 GHz, and/or may communicate using an operating bandhaving a second frequency range (FR2), which may span from 24.25 GHz to52.6 GHz. The frequencies between FR1 and FR2 are sometimes referred toas mid-band frequencies. Although a portion of FR1 is greater than 6GHz, FR1 is often referred to as a “sub-6 GHz” band. Similarly, FR2 isoften referred to as a “millimeter wave” band despite being differentfrom the extremely high frequency (EHF) band (30 GHz-300 GHz) which isidentified by the International Telecommunications Union (ITU) as a“millimeter wave” band. Thus, unless specifically stated otherwise, itshould be understood that the term “sub-6 GHz” or the like, if usedherein, may broadly represent frequencies less than 6 GHz, frequencieswithin FR1, and/or mid-band frequencies (e.g., greater than 7.125 GHz).Similarly, unless specifically stated otherwise, it should be understoodthat the term “millimeter wave” or the like, if used herein, may broadlyrepresent frequencies within the EHF band, frequencies within FR2,and/or mid-band frequencies (e.g., less than 24.25 GHz). It iscontemplated that the frequencies included in FR1 and FR2 may bemodified, and techniques described herein are applicable to thosemodified frequency ranges.

As indicated above, FIG. 1 is provided as an example. Other examples maydiffer from what is described with regard to FIG. 1.

FIG. 2 is a diagram illustrating an example 200 of a base station 110 incommunication with a UE 120 in a wireless network 100, in accordancewith the present disclosure. Base station 110 may be equipped with Tantennas 234 a through 234 t, and UE 120 may be equipped with R antennas252 a through 252 r, where in general T≥1 and R≥1.

At base station 110, a transmit processor 220 may receive data from adata source 212 for one or more UEs, select one or more modulation andcoding schemes (MCS) for each UE based at least in part on channelquality indicators (CQIs) received from the UE, process (e.g., encodeand modulate) the data for each UE based at least in part on the MCS(s)selected for the UE, and provide data symbols for all UEs. Transmitprocessor 220 may also process system information (e.g., for semi-staticresource partitioning information (SRPI)) and control information (e.g.,CQI requests, grants, and/or upper layer signaling) and provide overheadsymbols and control symbols. Transmit processor 220 may also generatereference symbols for reference signals (e.g., a cell-specific referencesignal (CRS) or a demodulation reference signal (DMRS)) andsynchronization signals (e.g., a primary synchronization signal (PSS) ora secondary synchronization signal (SSS)). A transmit (TX)multiple-input multiple-output (MIMO) processor 230 may perform spatialprocessing (e.g., precoding) on the data symbols, the control symbols,the overhead symbols, and/or the reference symbols, if applicable, andmay provide T output symbol streams to T modulators (MODs) 232 a through232 t. Each modulator 232 may process a respective output symbol stream(e.g., for OFDM) to obtain an output sample stream. Each modulator 232may further process (e.g., convert to analog, amplify, filter, andupconvert) the output sample stream to obtain a downlink signal. Tdownlink signals from modulators 232 a through 232 t may be transmittedvia T antennas 234 a through 234 t, respectively.

At UE 120, antennas 252 a through 252 r may receive the downlink signalsfrom base station 110 and/or other base stations and may providereceived signals to demodulators (DEMODs) 254 a through 254 r,respectively. Each demodulator 254 may condition (e.g., filter, amplify,downconvert, and digitize) a received signal to obtain input samples.Each demodulator 254 may further process the input samples (e.g., forOFDM) to obtain received symbols. A MIMO detector 256 may obtainreceived symbols from all R demodulators 254 a through 254 r, performMIMO detection on the received symbols if applicable, and providedetected symbols. A receive processor 258 may process (e.g., demodulateand decode) the detected symbols, provide decoded data for UE 120 to adata sink 260, and provide decoded control information and systeminformation to a controller/processor 280. The term“controller/processor” may refer to one or more controllers, one or moreprocessors, or a combination thereof. A channel processor may determinea reference signal received power (RSRP) parameter, a received signalstrength indicator (RSSI) parameter, a reference signal received quality(RSRQ) parameter, and/or a channel quality indicator (CQI) parameter,among other examples. In some aspects, one or more components of UE 120may be included in a housing 284.

Network controller 130 may include communication unit 294,controller/processor 290, and memory 292. Network controller 130 mayinclude, for example, one or more devices in a core network. Networkcontroller 130 may communicate with base station 110 via communicationunit 294.

Antennas (e.g., antennas 234 a through 234 t and/or antennas 252 athrough 252 r) may include, or may be included within, one or moreantenna panels, antenna groups, sets of antenna elements, and/or antennaarrays, among other examples. An antenna panel, an antenna group, a setof antenna elements, and/or an antenna array may include one or moreantenna elements. An antenna panel, an antenna group, a set of antennaelements, and/or an antenna array may include a set of coplanar antennaelements and/or a set of non-coplanar antenna elements. An antennapanel, an antenna group, a set of antenna elements, and/or an antennaarray may include antenna elements within a single housing and/orantenna elements within multiple housings. An antenna panel, an antennagroup, a set of antenna elements, and/or an antenna array may includeone or more antenna elements coupled to one or more transmission and/orreception components, such as one or more components of FIG. 2.

On the uplink, at UE 120, a transmit processor 264 may receive andprocess data from a data source 262 and control information (e.g., forreports that include RSRP, RSSI, RSRQ, and/or CQI) fromcontroller/processor 280. Transmit processor 264 may also generatereference symbols for one or more reference signals. The symbols fromtransmit processor 264 may be precoded by a TX MIMO processor 266 ifapplicable, further processed by modulators 254 a through 254 r (e.g.,for DFT-s-OFDM or CP-OFDM), and transmitted to base station 110. In someaspects, a modulator and a demodulator (e.g., MOD/DEMOD 254) of the UE120 may be included in a modem of the UE 120. In some aspects, the UE120 includes a transceiver. The transceiver may include any combinationof antenna(s) 252, modulators and/or demodulators 254, MIMO detector256, receive processor 258, transmit processor 264, and/or TX MIMOprocessor 266. The transceiver may be used by a processor (e.g.,controller/processor 280) and memory 282 to perform aspects of any ofthe methods described herein (for example, as described with referenceto FIGS. 4-7.

At base station 110, the uplink signals from UE 120 and other UEs may bereceived by antennas 234, processed by demodulators 232, detected by aMIMO detector 236 if applicable, and further processed by a receiveprocessor 238 to obtain decoded data and control information sent by UE120. Receive processor 238 may provide the decoded data to a data sink239 and the decoded control information to controller/processor 240.Base station 110 may include communication unit 244 and communicate tonetwork controller 130 via communication unit 244. Base station 110 mayinclude a scheduler 246 to schedule UEs 120 for downlink and/or uplinkcommunications. In some aspects, a modulator and a demodulator (e.g.,MOD/DEMOD 232) of the base station 110 may be included in a modem of thebase station 110. In some aspects, the base station 110 includes atransceiver. The transceiver may include any combination of antenna(s)234, modulators and/or demodulators 232, MIMO detector 236, receiveprocessor 238, transmit processor 220, and/or TX MIMO processor 230. Thetransceiver may be used by a processor (e.g., controller/processor 240)and memory 242 to perform aspects of any of the methods described herein(for example, as described with reference to FIGS. 4-7).

Controller/processor 240 of base station 110, controller/processor 280of UE 120, and/or any other component(s) of FIG. 2 may perform one ormore techniques associated with determining PDCCH candidates aggregatedover different numbers of monitoring occasions, as described in moredetail elsewhere herein. For example, controller/processor 240 of basestation 110, controller/processor 280 of UE 120, and/or any othercomponent(s) of FIG. 2 may perform or direct operations of, for example,process 600 of FIG. 6, process 700 of FIG. 7, and/or other processes asdescribed herein. Memories 242 and 282 may store data and program codesfor base station 110 and UE 120, respectively. In some aspects, memory242 and/or memory 282 may include a non-transitory computer-readablemedium storing one or more instructions (e.g., code and/or program code)for wireless communication. For example, the one or more instructions,when executed (e.g., directly, or after compiling, converting, and/orinterpreting) by one or more processors of the base station 110 and/orthe UE 120, may cause the one or more processors, the UE 120, and/or thebase station 110 to perform or direct operations of, for example,process 600 of FIG. 6, process 700 of FIG. 7, and/or other processes asdescribed herein. In some aspects, executing instructions may includerunning the instructions, converting the instructions, compiling theinstructions, and/or interpreting the instructions, among otherexamples.

In some aspects, UE 120 may include means for receiving an indication ofa set of aggregation levels for a set of PDCCH candidates within asearch space; means for determining a first subset of PDCCH candidates,of the set of PDCCH candidates, that are each aggregated within a singlePDCCH monitoring occasion, and a second subset of PDCCH candidates, ofthe set of PDCCH candidates, that are each aggregated across multiplePDCCH monitoring occasions; and/or the like. In some aspects, such meansmay include one or more components of UE 120 described in connectionwith FIG. 2, such as controller/processor 280, transmit processor 264,TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector256, receive processor 258, and/or the like.

In some aspects, the user equipment (UE) includes means for receiving anindication of a set of aggregation levels for a set of physical downlinkcontrol channel (PDCCH) candidates within a search space; and/or meansfor decoding a first subset of PDCCH candidates, of the set of PDCCHcandidates, that are each aggregated within a single PDCCH monitoringoccasion, and a second subset of PDCCH candidates, of the set of PDCCHcandidates, that are each aggregated across multiple PDCCH monitoringoccasions. The means for the user equipment (UE) to perform operationsdescribed herein may include, for example, one or more of antenna 252,demodulator 254, MIMO detector 256, receive processor 258, transmitprocessor 264, TX MIMO processor 266, modulator 254,controller/processor 280, or memory 282.

In some aspects, the base station includes means for transmitting anindication of a configuration of a search space having a first subset ofphysical downlink control channel (PDCCH) candidates, that are eachaggregated within a single PDCCH monitoring occasion and a second subsetof PDCCH candidates, that are each aggregated across multiple PDCCHmonitoring occasions; and/or means for transmitting a PDCCHcommunication using a PDCCH candidate of the first subset of PDCCHcandidates or the second subset of PDCCH candidates. The means for thebase station to perform operations described herein may include, forexample, one or more of transmit processor 220, TX MIMO processor 230,modulator 232, antenna 234, demodulator 232, MIMO detector 236, receiveprocessor 238, controller/processor 240, memory 242, or scheduler 246.

While blocks in FIG. 2 are illustrated as distinct components, thefunctions described above with respect to the blocks may be implementedin a single hardware, software, or combination component or in variouscombinations of components. For example, the functions described withrespect to the transmit processor 264, the receive processor 258, and/orthe TX MIMO processor 266 may be performed by or under the control ofcontroller/processor 280.

As indicated above, FIG. 2 is provided as an example. Other examples maydiffer from what is described with regard to FIG. 2.

FIG. 3 is a diagram illustrating an example resource structure 300 forwireless communication, in accordance with the present disclosure.Resource structure 300 shows an example of various groups of resourcesdescribed herein. As shown, resource structure 300 may include asubframe 305. Subframe 305 may include multiple slots 310. Whileresource structure 300 is shown as including 2 slots per subframe, adifferent number of slots may be included in a subframe (e.g., 4 slots,8 slots, 16 slots, 32 slots, and/or the like). In some aspects,different types of transmission time intervals (TTIs) may be used, otherthan subframes and/or slots. A slot 310 may include multiple symbols315, such as 7 symbols per slot, 14 symbols per slot, and/or the like.

The potential control region of a slot 310 may be referred to as aCORESET 320 and may be structured to support an efficient use ofresources, such as by flexible configuration or reconfiguration ofresources of the CORESET 320 for one or more PDCCHs, one or morephysical downlink shared channels (PDSCHs), and/or the like. In someaspects, the CORESET 320 may occupy the first symbol 315 of a slot 310,the first two symbols 315 of a slot 310, the first three symbols 315 ofa slot 310, and/or the like. Thus, a CORESET 320 may include multipleresource blocks (RBs) in the frequency domain, and either one, two, orthree symbols 315 in the time domain. In 5G, a quantity of resourcesincluded in the CORESET 320 may be flexibly configured, such as by usingradio resource control (RRC) signaling to indicate a frequency domainregion (e.g., a quantity of resource blocks) and/or a time domain region(e.g., a quantity of symbols) for the CORESET 320.

As illustrated, a symbol 315 that includes CORESET 320 may include oneor more control channel elements (CCEs) 325, shown in FIG. 3 as two CCEs325 as an example, that span a portion of the system bandwidth. A CCE325 may include downlink control information (DCI) that is used toprovide control information for wireless communication. A base stationmay transmit DCI during multiple CCEs 325 (as shown), where the quantityof CCEs 325 used for transmission of DCI represents the aggregationlevel (AL) used by the BS for the transmission of DCI. In FIG. 3, anaggregation level of two is shown as an example, corresponding to twoCCEs 325 in a slot 310. In some aspects, different aggregation levelsmay be used, such as 1, 4, 8, 16, and/or the like.

Each CCE 325 may include a fixed quantity of resource element groups(REGs) 330, shown as four REGs 330 in the example of FIG. 3, or mayinclude a variable quantity of REGs 330. In some aspects, the quantityof REGs 330 included in a CCE 325 may be specified by a REG bundle size.A REG 330 may include one resource block, which may include 12 resourceelements (REs) 335 within a symbol 315. A resource element 335 mayoccupy one subcarrier in the frequency domain and one OFDM symbol in thetime domain.

A search space may include all possible locations (e.g., in time and/orfrequency) where a PDCCH may be located. A CORESET 320 may include oneor more search spaces, such as a UE-specific search space, agroup-common search space, and/or a common search space. A search spacemay indicate a set of CCE locations where a UE may find PDCCHs that canpotentially be used to transmit control information to the UE. Thepossible locations for the PDCCH may depend on whether the PDCCH is aUE-specific PDCCH (e.g., for a single UE) or a group-common PDCCH (e.g.,for multiple UEs), an aggregation level being used, and/or the like. Apossible location (e.g., in time and/or frequency) for the PDCCH may bereferred to as a PDCCH candidate, and the set of all possible PDCCHlocations may be referred to as a search space. For example, the set ofall possible PDCCH locations for a particular UE may be referred to as aUE-specific search space. Similarly, the set of all possible PDCCHlocations across all UEs may be referred to as a common search space.The set of all possible PDCCH locations for a particular group of UEsmay be referred to as a group-common search space.

A CORESET 320 may be interleaved or non-interleaved. An interleavedCORESET 320 may have CCE-to-REG mapping such that adjacent CCEs aremapped to scattered REG bundles in the frequency domain (e.g., adjacentCCEs are not mapped to consecutive REG bundles of the CORESET 320). Anon-interleaved CORESET 320 may have a CCE-to-REG mapping such that allCCEs are mapped to consecutive REG bundles (e.g., in the frequencydomain) of the CORESET 320.

As indicated above, FIG. 3 is provided as an example. Other examples maydiffer from what is described with respect to FIG. 3.

A base station may configure a set of PDCCH candidates within a singlePDCCH monitoring occasion or for multiple monitoring occasions. In otherwords, the set of PDCCH candidates may include CCEs located within onlya signal PDCCH monitoring occasion or may include CCEs located within afirst PDCCH monitoring occasion and CCEs located within a second PDCCHmonitoring occasion. In some examples, a base station may transmit agroup-common DCI that activates a preconfigured monitoring aggregationlevel (e.g., a grouping of PDCCH monitoring occasions for repetition ofa same PDCCH). However, a group-common DCI that activates apreconfigured PDCCH monitoring aggregation level may indicate that allUEs that receive the group-common DCI are to search for all PDCCHcandidates aggregated over the same number of PDCCH monitoringoccasions. For UEs with good reception conditions, using aggregatedPDCCH monitoring occasions for all PDCCH candidates may unnecessarilyconsume communication resources.

In some aspects described herein, a network (e.g., via a base station)may define a first subset of PDCCH candidates and a second subset ofPDCCH candidates. The first subset of PDCCH candidates may include PDCCHcandidates that are each aggregated (e.g., having multiple CCEs) withina single PDCCH monitoring occasion. The second subset of PDCCHcandidates may include PDCCH candidates that are each aggregated acrossmultiple PDCCH monitoring occasions.

In some aspects, a UE may determine whether a PDCCH candidate isassigned to the first subset of PDCCH candidates aggregated over asingle PDCCH monitoring occasion or is assigned to the second subset ofPDCCH candidates aggregated over multiple PDCCH monitoring occasionsbased at least in part on an aggregation level of the PDCCH candidate.In some aspects, the UE may determine an aggregation level threshold(e.g., via signaling from the base station, a communication standard,and/or the like) to use for determining whether the PDCCH candidate isassigned to the first subset of PDCCH candidates or the second subset ofPDCCH candidates. For example, the PDCCH candidate may be assigned tothe second subset of PDCCH candidates, with aggregation over multiplePDCCH monitoring occasions, based at least in part on the PDCCHcandidate having an aggregation level that satisfies the aggregationlevel threshold.

Based at least in part on the UE monitoring for some PDCCH candidateswithin a single PDCCH monitoring occasion and for other PDCCH candidateswithin multiple PDCCH monitoring occasions, the UE may conservecomputing, communication, network, and power resources by receiving aPDCCH message using a single PDCCH monitoring occasion when appropriate(e.g., based at least in part on channel conditions) and receiving aPDCCH message using multiple PDCCH monitoring occasions whenappropriate. For example, a UE with a signal to interference plus noiseratio (SINR) that satisfies a threshold may be capable of receiving aPDCCH message within a single PDCCH monitoring occasion and withoutcoverage benefits of receiving the PDCCH message within multiple PDCCHmonitoring occasions (e.g., repetition, time diversity, and/or thelike). Based at least in part on receiving the PDCCH message within thesingle PDCCH monitoring occasion, the UE may ignore other PDCCHmonitoring occasions.

FIG. 4 is a diagram illustrating an example 400 associated withdetermining PDCCH candidates aggregated over different numbers ofmonitoring occasions, in accordance with the present disclosure. Asshown in FIG. 4, a UE (e.g., UE 120) may communicate with a base station(e.g., base station 110). The UE and the base station may be part of awireless network (e.g., wireless network 100).

As shown by reference number 405, the base station may transmit, and theUE may receive, configuration information. In some aspects, the UE mayreceive the configuration information from another device (e.g., fromanother base station, another UE, and/or the like), from a specificationof a communication standard, and/or the like. In some aspects, the UEmay receive the configuration information via one or more of radioresource control (RRC) signaling, medium access control (MAC) signaling(e.g., MAC control elements (MAC CEs)), and/or the like. In someaspects, the configuration information may include an indication of oneor more configuration parameters (e.g., already known to the UE) forselection by the UE, explicit configuration information for the UE touse to configure the UE, and/or the like.

In some aspects, the configuration information may indicate that the UEis to determine a first subset of PDCCH candidates and a second subsetof PDCCH candidates, where the first subset of PDCCH candidates are eachaggregated within a single PDCCH monitoring occasion and the secondsubset of PDCCH candidates are each aggregated across multiple PDCCHmonitoring occasions. In some aspects, the configuration information mayprovide information for determining the first subset and the secondsubset (e.g., determining whether particular PDCCH candidates areassigned to the first subset or the second subset), such as anindication of an aggregation level threshold. The UE may identify PDCCHcandidates that are to be aggregated within a single PDCCH monitoringoccasion (e.g., the first subset of PDCCH candidates) and PDCCHcandidates that are to be aggregated across multiple PDCCH monitoringoccasions (e.g., the second subset of PDCCH candidates) based at leastin part on the information (e.g., the indication of the aggregationthreshold).

In some aspects, the configuration information may indicate that the UEis to determine the aggregation threshold based at least in part on oneor more parameters of a CORESET that includes the set of PDCCHcandidates. For example, the configuration information may indicate thatthe UE is to determine the aggregation threshold based at least in parton a frequency range of the CORESET, a frequency band of the CORESET, asubcarrier spacing of the CORESET, a number of symbols of the CORESET, anumber of resources (e.g., CCEs, resource blocks, REGs, and/or the like)of the CORESET, and/or the like.

In some aspects, the configuration information may indicate that the UEis to determine the aggregation threshold based at least in part on anindication within a search space configuration associated with the setof PDCCH candidates, an explicit indication within dynamic signaling(e.g., UE-specific DCI or MAC CE, group-common DCI or MAC CE, and/or thelike), an implicit indication within dynamic signaling (e.g., anindication of coverage enhancement, an indication of monitoringaggregation, and/or the like), and/or the like.

As shown by reference number 410, the UE may configure the UE forcommunicating with the one or more base stations. In some aspects, theUE may configure the UE based at least in part on the configurationinformation. In some aspects, the UE may be configured to perform one ormore operations described herein.

As shown by reference number 415, the UE may receive, and the basestation may transmit, an indication of a set of aggregation levels for aset of PDCCH candidates within a search space. For example, the UE mayreceive an indication of a search space configuration. The indicationmay identify a known search space configuration (e.g., an indication ofa previously received search space configuration), an explicitdescription of the search space configuration, and/or the like.

As shown by reference number 420, the UE may receive, and the basestation may transmit, an indication of an aggregation threshold. In someaspects, the indication of the aggregation threshold may be received ina same message as the indication of the set of aggregation levels (e.g.,a search space configuration message), the configuration information,and/or the like. In some aspects, the UE may receive the indication ofthe aggregation threshold via dynamic signaling (e.g., a DCI message,one or more MAC CEs, and/or the like), RRC signaling (e.g., a configuredgrant), and/or the like.

In some aspects, the indication may be an explicit indication or animplicit indication. For example, the indication may be an explicitindication within dynamic signaling, such as UE-specific or agroup-common DCI message or one or more MAC CEs. The indication may bean implicit indication within dynamic signaling, such as an indicationof coverage enhancement, an indication of monitoring aggregation, and/orthe like.

As shown by reference number 425, the UE may determine a first subset ofPDCCH candidates and a second subset of PDCCH candidates. In someaspects, the UE may determine the first subset of PDCCH candidates andthe second subset of PDCCH candidates based at least in part onindicated aggregation levels of each of the first subset of PDCCHcandidates and each of the second subset of PDCCH candidates. The UE maydetermine the second subset of PDCCH candidates based at least in parton each PDCCH candidate of the second subset of PDCCH candidates havingaggregation levels that satisfy the aggregation level threshold.

In some aspects, the UE may determine the aggregation level thresholdbased at least in part on the indication of the aggregation levelthreshold, the configuration information, the search spaceconfiguration, and/or the like. In some aspects, the UE may determinethe aggregation level threshold based at least in part on a definitionbased at least in part on configuration information, a frequency rangeof a control resource set (CORESET) that includes the set of PDCCHcandidates, a frequency band of the CORESET, a subcarrier spacing of theCORESET, a number of symbols of the CORESET, a number of resources ofthe CORESET, and/or the like.

In some aspects, one or more CCEs may be assigned to both of a PDCCHcandidate within the first subset of PDCCH candidates and a PDCCHcandidate within the second subset of PDCCH candidates. In some aspects,one or more PDCCH candidates within the first subset of PDCCH candidatesmay be aggregated within a first PDCCH monitoring occasion and one ormore PDCCH candidates within the first subset of PDCCH candidates may beaggregated within a second PDCCH monitoring occasion.

As shown by reference number 430, the UE may receive, and the basestation may transmit, a downlink communication including the set ofPDCCH candidates (e.g., including the first subset of PDCCH candidatesand the second subset of PDCCH candidates). In some aspects, the UE mayreceive the downlink communication based at least in part on the CORESETconfiguration, a previously received grant (e.g., a dynamic grant, aconfigured grant, and/or the like), and/or the like.

As shown by reference number 435, the UE may monitor the set of PDCCHcandidates for a PDCCH communication. For example, the UE may monitorthe set of PDCCH candidates within single PDCCH monitoring occasions ofa search space (e.g., for PDCCH candidates of the first subset) andwithin multiple PDCCH monitoring occasions of the search space (e.g.,for PDCCH candidates of the second subset).

Based at least in part on the UE monitoring for the first subset ofPDCCH candidates within a single PDCCH monitoring occasion and for thesecond subset of PDCCH candidates within multiple PDCCH monitoringoccasions, the UE may conserve computing, communication, network, andpower resources by receiving a PDCCH message using a single PDCCHmonitoring occasion when appropriate (e.g., based at least in part onchannel conditions) and receiving a PDCCH message using multiple PDCCHmonitoring occasions when appropriate.

As indicated above, FIG. 4 is provided as an example. Other examples maydiffer from what is described with respect to FIG. 4.

FIG. 5 is a diagram illustrating an example 500 associated withdetermining PDCCH candidates aggregated over different numbers ofmonitoring occasions, in accordance with the present disclosure.

As shown in FIG. 5, a CORESET may include a first PDCCH monitoringoccasion 505 and a second PDCCH monitoring occasion 510. In someaspects, the two PDCCH monitoring occasions 505 and 510 may be within aslot of a subframe.

A first PDCCH monitoring occasion 505 may include two CCEs associatedwith a first PDCCH candidate 515. The first PDCCH monitoring occasion505 may include a single CCE associated with a second PDCCH candidate520. The second PDCCH monitoring occasion 510 may include four CCEsassociated with a third PDCCH candidate 525.

The first PDCCH monitoring occasion 505 may include a first portion 530(e.g., one or more CCEs) of a fourth PDCCH candidate 540 and the secondPDCCH monitoring occasion 510 may include a second portion 535 of thefourth PDCCH candidate 540. In other words, the first PDCCH candidate515, the second PDCCH candidate 520, and the third PDCCH candidate 525may be assigned to a first subset of PDCCH candidates that areaggregated within single PDCCH monitoring occasions and the fourth PDCCHcandidate 540 may be assigned to a second subset of PDCCH candidatesthat are aggregated across the two PDCCH monitoring occasions 505 and510.

As indicated above, FIG. 5 is provided as an example. Other examples maydiffer from what is described with respect to FIG. 5.

FIG. 6 is a diagram illustrating an example process 600 performed, forexample, by a UE, in accordance with the present disclosure. Exampleprocess 600 is an example where the UE (e.g., UE 120 and/or the like)performs operations associated with PDCCH candidates aggregated overdifferent numbers of monitoring occasions.

As shown in FIG. 6, in some aspects, process 600 may include receivingan indication of a set of aggregation levels for a set of PDCCHcandidates within a search space (block 610). For example, the UE (e.g.,using receive processor 258, controller/processor 280, memory 282,and/or the like) may receive an indication of a set of aggregationlevels for a set of PDCCH candidates within a search space, as describedabove.

As further shown in FIG. 6, in some aspects, process 600 may includedecoding a first subset of PDCCH candidates, of the set of PDCCHcandidates, that are each aggregated within a single PDCCH monitoringoccasion, and a second subset of PDCCH candidates, of the set of PDCCHcandidates, that are each aggregated across multiple PDCCH monitoringoccasions (block 620). For example, the UE (e.g., using receiveprocessor 258, controller/processor 280, memory 282, and/or the like)may decode a first subset of PDCCH candidates, of the set of PDCCHcandidates, that are each aggregated within a single PDCCH monitoringoccasion, and a second subset of PDCCH candidates, of the set of PDCCHcandidates, that are each aggregated across multiple PDCCH monitoringoccasions, as described above.

Process 600 may include additional aspects, such as any single aspect orany combination of aspects described below and/or in connection with oneor more other processes described elsewhere herein.

In a first aspect, process 600 includes monitoring the first subset ofPDCCH candidates within the single PDCCH monitoring occasion andmonitoring the second subset of PDCCH candidates on the multiple PDCCHmonitoring occasions.

In a second aspect, alone or in combination with the first aspect,decoding the first subset of PDCCH candidates and the second subset ofPDCCH candidates includes determining the first subset of PDCCHcandidates and the second subset of PDCCH candidates based at least inpart on indicated aggregation levels of each of the first subset ofPDCCH candidates and each of the second subset of PDCCH candidates.

In a third aspect, alone or in combination with one or more of the firstand second aspects, the second subset of PDCCH candidates haveaggregation levels that each satisfy an aggregation level threshold.

In a fourth aspect, alone or in combination with one or more of thefirst through third aspects, the aggregation level threshold is based atleast in part on one or more of: a definition based at least in part onconfiguration information, a frequency range of a CORESET that includesthe set of PDCCH candidates, a frequency band of the CORESET, asubcarrier spacing of the CORESET, a number of symbols of the CORESET,or a number of resources of the CORESET.

In a fifth aspect, alone or in combination with one or more of the firstthrough fourth aspects, process 600 includes determining the aggregationlevel threshold based at least in part on one or more of: a search spaceconfiguration, RRC signaling, a DCI message, or one or more MAC CEs.

In a sixth aspect, alone or in combination with one or more of the firstthrough fifth aspects, process 600 includes determining the aggregationlevel threshold based at least in part on one or more of an implicitindication or an explicit indication of the aggregation level threshold.

In a seventh aspect, alone or in combination with one or more of thefirst through sixth aspects, a first PDCCH candidate, of the firstsubset of PDCCH candidates, includes a first set of CCEs of a firstPDCCH monitoring occasion; and a second PDCCH candidate, of the secondsubset of PDCCH candidates, includes the first set of CCEs of the firstPDCCH monitoring occasion and a second set of CCEs of a second PDCCHmonitoring occasion.

Although FIG. 6 shows example blocks of process 600, in some aspects,process 600 may include additional blocks, fewer blocks, differentblocks, or differently arranged blocks than those depicted in FIG. 6.Additionally, or alternatively, two or more of the blocks of process 600may be performed in parallel.

FIG. 7 is a diagram illustrating an example process 700 performed, forexample, by a base station, in accordance with the present disclosure.Example process 700 is an example where the base station (e.g., basestation 110) performs operations associated with physical downlinkcontrol channel candidates aggregated over different numbers ofmonitoring occasions.

As shown in FIG. 7, in some aspects, process 700 may includetransmitting an indication of a configuration of a search space having afirst subset of PDCCH candidates, that are each aggregated within asingle PDCCH monitoring occasion, and a second subset of PDCCHcandidates, that are each aggregated across multiple PDCCH monitoringoccasions (block 710). For example, the base station (e.g., usingcontroller/processor 240, transmit processor 220, TX MIMO processor 230,MOD 232, and/or antenna 234, among other examples) may transmit anindication of a configuration of a search space having a first subset ofPDCCH candidates, that are each aggregated within a single PDCCHmonitoring occasion and a second subset of PDCCH candidates, that areeach aggregated across multiple PDCCH monitoring occasions, as describedabove.

As further shown in FIG. 7, in some aspects, process 700 may includetransmitting a PDCCH communication using a PDCCH candidate of the firstsubset of PDCCH candidates or the second subset of PDCCH candidates(block 720). For example, the base station (using controller/processor240, transmit processor 220, TX MIMO processor 230, MOD 232, and/orantenna 234, among other examples) may transmit a PDCCH communicationusing a PDCCH candidate of the first subset of PDCCH candidates or thesecond subset of PDCCH candidates, as described above.

Process 700 may include additional aspects, such as any single aspect orany combination of aspects described below and/or in connection with oneor more other processes described elsewhere herein.

In a first aspect, a PDCCH candidate is associated with the first subsetof PDCCH candidates or the second subset of PDCCH candidates based atleast in part on an aggregation level of the PDCCH candidate.

In a second aspect, alone or in combination with the first aspect, thesecond subset of PDCCH candidates have aggregation levels that eachsatisfy an aggregation level threshold.

In a third aspect, alone or in combination with one or more of the firstand second aspects, the aggregation level threshold is based at least inpart on one or more of a definition based at least in part onconfiguration information, a frequency range of a CORESET that includesthe set of PDCCH candidates, a frequency band of the CORESET, asubcarrier spacing of the CORESET, a number of symbols of the CORESET,or a number of resources of the CORESET.

In a fourth aspect, alone or in combination with one or more of thefirst through third aspects, process 700 includes transmitting anindication of the aggregation level threshold based at least in part onone or more of a search space configuration, RRC signaling, a DCImessage, or one or more MAC CEs.

In a fifth aspect, alone or in combination with one or more of the firstthrough fourth aspects, process 700 includes transmitting an indicationof the aggregation level threshold based at least in part on one or moreof an implicit indication or an explicit indication of the aggregationlevel threshold.

In a sixth aspect, alone or in combination with one or more of the firstthrough fifth aspects, a first PDCCH candidate, of the first subset ofPDCCH candidates, comprises a first set of control channel elements of afirst PDCCH monitoring occasion, and a second PDCCH candidate, of thesecond subset of PDCCH candidates, comprises the first set of controlchannel elements of the first PDCCH monitoring occasion and a second setof control channel elements of a second PDCCH monitoring occasion.

Although FIG. 7 shows example blocks of process 700, in some aspects,process 700 may include additional blocks, fewer blocks, differentblocks, or differently arranged blocks than those depicted in FIG. 7.Additionally, or alternatively, two or more of the blocks of process 700may be performed in parallel.

The following provides an overview of some Aspects of the presentdisclosure:

Aspect 1: A method of wireless communication performed by a userequipment (UE), comprising: receiving an indication of a set ofaggregation levels for a set of physical downlink control channel(PDCCH) candidates within a search space; and decoding a first subset ofPDCCH candidates, of the set of PDCCH candidates, that are eachaggregated within a single PDCCH monitoring occasion, and a secondsubset of PDCCH candidates, of the set of PDCCH candidates, that areeach aggregated across multiple PDCCH monitoring occasions.

Aspect 2: The method of Aspect 1, further comprising: monitoring thefirst subset of PDCCH candidates within the single PDCCH monitoringoccasion; and monitoring the second subset of PDCCH candidates on themultiple PDCCH monitoring occasions.

Aspect 3: The method of any of Aspects 1-2, wherein decoding the firstsubset of PDCCH candidates and the second subset of PDCCH candidatescomprises: determining the first subset of PDCCH candidates and thesecond subset of PDCCH candidates based at least in part on indicatedaggregation levels of each of the first subset of PDCCH candidates andeach of the second subset of PDCCH candidates.

Aspect 4: The method of Aspect 3, wherein the second subset of PDCCHcandidates have aggregation levels that each satisfy an aggregationlevel threshold.

Aspect 5: The method of Aspect 4, wherein the aggregation levelthreshold is based at least in part on one or more of: a definitionbased at least in part on configuration information, a frequency rangeof a control resource set (CORESET) that includes the set of PDCCHcandidates, a frequency band of the CORESET, a subcarrier spacing of theCORESET, a number of symbols of the CORESET, or a number of resources ofthe CORESET.

Aspect 6: The method of any of Aspects 4-5, further comprising:determining the aggregation level threshold based at least in part onone or more of: a search space configuration, radio resource controlsignaling, a downlink control information message, or one or more mediumaccess control control elements.

Aspect 7: The method of any of Aspects 4-6, further comprising:determining the aggregation level threshold based at least in part onone or more of an implicit indication or an explicit indication of theaggregation level threshold.

Aspect 8: The method of any of Aspects 1-7, wherein a first PDCCHcandidate, of the first subset of PDCCH candidates, comprises a firstset of control channel elements of a first PDCCH monitoring occasion,and wherein a second PDCCH candidate, of the second subset of PDCCHcandidates, comprises the first set of control channel elements of thefirst PDCCH monitoring occasion and a second set of control channelelements of a second PDCCH monitoring occasion.

Aspect 9: A method of wireless communication performed by a basestation, comprising: transmitting an indication of a configuration of asearch space having a first subset of physical downlink control channel(PDCCH) candidates, that are each aggregated within a single PDCCHmonitoring occasion and a second subset of PDCCH candidates, that areeach aggregated across multiple PDCCH monitoring occasions; andtransmitting a PDCCH communication using a PDCCH candidate of the firstsubset of PDCCH candidates or the second subset of PDCCH candidates.

Aspect 10: The method of Aspect 9, wherein a PDCCH candidate isassociated with the first subset of PDCCH candidates or the secondsubset of PDCCH candidates based at least in part on an aggregationlevel of the PDCCH candidate.

Aspect 11: The method of Aspect 10, wherein the second subset of PDCCHcandidates have aggregation levels that each satisfy an aggregationlevel threshold.

Aspect 12: The method of Aspect 11, wherein the aggregation levelthreshold is based at least in part on one or more of: a definitionbased at least in part on configuration information, a frequency rangeof a control resource set (CORESET) that includes the set of PDCCHcandidates, a frequency band of the CORESET, a subcarrier spacing of theCORESET, a number of symbols of the CORESET, or a number of resources ofthe CORESET.

Aspect 13: The method of any of Aspects 11-12, further comprising:transmitting an indication of the aggregation level threshold based atleast in part on one or more of: a search space configuration, radioresource control signaling, a downlink control information message, orone or more medium access control control elements.

Aspect 14: The method of any of Aspects 11-13, further comprising:transmitting an indication of the aggregation level threshold based atleast in part on one or more of an implicit indication or an explicitindication of the aggregation level threshold.

Aspect 15: The method of any of Aspects 9-14, wherein a first PDCCHcandidate, of the first subset of PDCCH candidates, comprises a firstset of control channel elements of a first PDCCH monitoring occasion,and wherein a second PDCCH candidate, of the second subset of PDCCHcandidates, comprises the first set of control channel elements of thefirst PDCCH monitoring occasion and a second set of control channelelements of a second PDCCH monitoring occasion.

Aspect 16: An apparatus for wireless communication at a device,comprising a processor; memory coupled with the processor; andinstructions stored in the memory and executable by the processor tocause the apparatus to perform the method of one or more of Aspects1-15.

Aspect 17: A device for wireless communication, comprising a memory andone or more processors coupled to the memory, the one or more processorsconfigured to perform the method of one or more of Aspects 1-15.

Aspect 18: An apparatus for wireless communication, comprising at leastone means for performing the method of one or more of Aspects 1-15.

Aspect 19: A non-transitory computer-readable medium storing code forwireless communication, the code comprising instructions executable by aprocessor to perform the method of one or more of Aspects 1-15.

Aspect 20: A non-transitory computer-readable medium storing a set ofinstructions for wireless communication, the set of instructionscomprising one or more instructions that, when executed by one or moreprocessors of a device, cause the device to perform the method of one ormore of Aspects 1-15.

The foregoing disclosure provides illustration and description, but isnot intended to be exhaustive or to limit the aspects to the preciseforms disclosed. Modifications and variations may be made in light ofthe above disclosure or may be acquired from practice of the aspects.

As used herein, the term “component” is intended to be broadly construedas hardware and/or a combination of hardware and software. “Software”shall be construed broadly to mean instructions, instruction sets, code,code segments, program code, programs, subprograms, software modules,applications, software applications, software packages, routines,subroutines, objects, executables, threads of execution, procedures,and/or functions, among other examples, whether referred to as software,firmware, middleware, microcode, hardware description language, orotherwise. As used herein, a processor is implemented in hardware and/ora combination of hardware and software. It will be apparent that systemsand/or methods described herein may be implemented in different forms ofhardware and/or a combination of hardware and software. The actualspecialized control hardware or software code used to implement thesesystems and/or methods is not limiting of the aspects. Thus, theoperation and behavior of the systems and/or methods were describedherein without reference to specific software code—it being understoodthat software and hardware can be designed to implement the systemsand/or methods based, at least in part, on the description herein.

As used herein, satisfying a threshold may, depending on the context,refer to a value being greater than the threshold, greater than or equalto the threshold, less than the threshold, less than or equal to thethreshold, equal to the threshold, not equal to the threshold, or thelike.

Even though particular combinations of features are recited in theclaims and/or disclosed in the specification, these combinations are notintended to limit the disclosure of various aspects. In fact, many ofthese features may be combined in ways not specifically recited in theclaims and/or disclosed in the specification. Although each dependentclaim listed below may directly depend on only one claim, the disclosureof various aspects includes each dependent claim in combination withevery other claim in the claim set. As used herein, a phrase referringto “at least one of” a list of items refers to any combination of thoseitems, including single members. As an example, “at least one of: a, b,or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well asany combination with multiples of the same element (e.g., a-a, a-a-a,a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or anyother ordering of a, b, and c).

No element, act, or instruction used herein should be construed ascritical or essential unless explicitly described as such. Also, as usedherein, the articles “a” and “an” are intended to include one or moreitems and may be used interchangeably with “one or more.” Further, asused herein, the article “the” is intended to include one or more itemsreferenced in connection with the article “the” and may be usedinterchangeably with “the one or more.” Furthermore, as used herein, theterms “set” and “group” are intended to include one or more items (e.g.,related items, unrelated items, or a combination of related andunrelated items), and may be used interchangeably with “one or more.”Where only one item is intended, the phrase “only one” or similarlanguage is used. Also, as used herein, the terms “has,” “have,”“having,” or the like are intended to be open-ended terms. Further, thephrase “based on” is intended to mean “based, at least in part, on”unless explicitly stated otherwise. Also, as used herein, the term “or”is intended to be inclusive when used in a series and may be usedinterchangeably with “and/or,” unless explicitly stated otherwise (e.g.,if used in combination with “either” or “only one of”).

What is claimed is:
 1. A method of wireless communication performed by a user equipment (UE), comprising: receiving an indication of a set of aggregation levels for a set of physical downlink control channel (PDCCH) candidates within a search space; and decoding a first subset of PDCCH candidates, of the set of PDCCH candidates, that are each aggregated within a single PDCCH monitoring occasion, and a second subset of PDCCH candidates, of the set of PDCCH candidates, that are each aggregated across multiple PDCCH monitoring occasions.
 2. The method of claim 1, further comprising: monitoring the first subset of PDCCH candidates within the single PDCCH monitoring occasion; and monitoring the second subset of PDCCH candidates on the multiple PDCCH monitoring occasions.
 3. The method of claim 1, wherein decoding the first subset of PDCCH candidates and the second subset of PDCCH candidates comprises: determining the first subset of PDCCH candidates and the second subset of PDCCH candidates based at least in part on indicated aggregation levels of each of the first subset of PDCCH candidates and each of the second subset of PDCCH candidates.
 4. The method of claim 3, wherein the second subset of PDCCH candidates have aggregation levels that each satisfy an aggregation level threshold.
 5. The method of claim 4, wherein the aggregation level threshold is based at least in part on one or more of: a definition based at least in part on configuration information, a frequency range of a control resource set (CORESET) that includes the set of PDCCH candidates, a frequency band of the CORESET, a subcarrier spacing of the CORESET, a number of symbols of the CORESET, or a number of resources of the CORESET.
 6. The method of claim 4, further comprising: determining the aggregation level threshold based at least in part on one or more of: a search space configuration, radio resource control signaling, a downlink control information message, or one or more medium access control control elements.
 7. The method of claim 4, further comprising: determining the aggregation level threshold based at least in part on one or more of an implicit indication or an explicit indication of the aggregation level threshold.
 8. The method of claim 1, wherein a first PDCCH candidate, of the first subset of PDCCH candidates, comprises a first set of control channel elements of a first PDCCH monitoring occasion, and wherein a second PDCCH candidate, of the second subset of PDCCH candidates, comprises the first set of control channel elements of the first PDCCH monitoring occasion and a second set of control channel elements of a second PDCCH monitoring occasion.
 9. A method of wireless communication performed by a base station, comprising: transmitting an indication of a configuration of a search space having a first subset of physical downlink control channel (PDCCH) candidates, that are each aggregated within a single PDCCH monitoring occasion and a second subset of PDCCH candidates, that are each aggregated across multiple PDCCH monitoring occasions; and transmitting a PDCCH communication using a PDCCH candidate of the first subset of PDCCH candidates or the second subset of PDCCH candidates.
 10. The method of claim 9, wherein a PDCCH candidate is associated with the first subset of PDCCH candidates or the second subset of PDCCH candidates based at least in part on an aggregation level of the PDCCH candidate.
 11. The method of claim 10, wherein the second subset of PDCCH candidates have aggregation levels that each satisfy an aggregation level threshold.
 12. The method of claim 11, wherein the aggregation level threshold is based at least in part on one or more of: a definition based at least in part on configuration information, a frequency range of a control resource set (CORESET) that includes the set of PDCCH candidates, a frequency band of the CORESET, a subcarrier spacing of the CORESET, a number of symbols of the CORESET, or a number of resources of the CORESET.
 13. The method of claim 11, further comprising: transmitting an indication of the aggregation level threshold based at least in part on one or more of: a search space configuration, radio resource control signaling, a downlink control information message, or one or more medium access control control elements.
 14. The method of claim 11, further comprising: transmitting an indication of the aggregation level threshold based at least in part on one or more of an implicit indication or an explicit indication of the aggregation level threshold.
 15. The method of claim 9, wherein a first PDCCH candidate, of the first subset of PDCCH candidates, comprises a first set of control channel elements of a first PDCCH monitoring occasion, and wherein a second PDCCH candidate, of the second subset of PDCCH candidates, comprises the first set of control channel elements of the first PDCCH monitoring occasion and a second set of control channel elements of a second PDCCH monitoring occasion.
 16. A user equipment (UE) for wireless communication, comprising: a memory; and one or more processors, coupled to the memory, configured to: receive an indication of a set of aggregation levels for a set of physical downlink control channel (PDCCH) candidates within a search space; and decode a first subset of PDCCH candidates, of the set of PDCCH candidates, that are each aggregated within a single PDCCH monitoring occasion, and a second subset of PDCCH candidates, of the set of PDCCH candidates, that are each aggregated across multiple PDCCH monitoring occasions.
 17. The UE of claim 16, wherein the one or more processors are further configured to: monitor the first subset of PDCCH candidates within the single PDCCH monitoring occasion; and monitor the second subset of PDCCH candidates on the multiple PDCCH monitoring occasions.
 18. The UE of claim 16, wherein the one or more processors, to decode the first subset of PDCCH candidates and the second subset of PDCCH candidates, are configured to: determine the first subset of PDCCH candidates and the second subset of PDCCH candidates based at least in part on indicated aggregation levels of each of the first subset of PDCCH candidates and each of the second subset of PDCCH candidates.
 19. The UE of claim 18, wherein the second subset of PDCCH candidates have aggregation levels that each satisfy an aggregation level threshold.
 20. The UE of claim 19, wherein the aggregation level threshold is based at least in part on one or more of: a definition based at least in part on configuration information, a frequency range of a control resource set (CORESET) that includes the set of PDCCH candidates, a frequency band of the CORESET, a subcarrier spacing of the CORESET, a number of symbols of the CORESET, or a number of resources of the CORESET.
 21. The UE of claim 19, wherein the one or more processors are further configured to: determine the aggregation level threshold based at least in part on one or more of: a search space configuration, radio resource control signaling, a downlink control information message, or one or more medium access control control elements.
 22. The UE of claim 19, wherein the one or more processors are further configured to: determine the aggregation level threshold based at least in part on one or more of an implicit indication or an explicit indication of the aggregation level threshold.
 23. The UE of claim 16, wherein a first PDCCH candidate, of the first subset of PDCCH candidates, comprises a first set of control channel elements of a first PDCCH monitoring occasion, and wherein a second PDCCH candidate, of the second subset of PDCCH candidates, comprises the first set of control channel elements of the first PDCCH monitoring occasion and a second set of control channel elements of a second PDCCH monitoring occasion.
 24. A base station for wireless communication, comprising: a memory; and one or more processors, coupled to the memory, configured to: transmit an indication of a configuration of a search space having a first subset of physical downlink control channel (PDCCH) candidates, that are each aggregated within a single PDCCH monitoring occasion and a second subset of PDCCH candidates, that are each aggregated across multiple PDCCH monitoring occasions; and transmit a PDCCH communication using a PDCCH candidate of the first subset of PDCCH candidates or the second subset of PDCCH candidates.
 25. The base station of claim 24, wherein a PDCCH candidate is associated with the first subset of PDCCH candidates or the second subset of PDCCH candidates based at least in part on an aggregation level of the PDCCH candidate.
 26. The base station of claim 25, wherein the second subset of PDCCH candidates have aggregation levels that each satisfy an aggregation level threshold.
 27. The base station of claim 26, wherein the aggregation level threshold is based at least in part on one or more of: a definition based at least in part on configuration information, a frequency range of a control resource set (CORESET) that includes the set of PDCCH candidates, a frequency band of the CORESET, a subcarrier spacing of the CORESET, a number of symbols of the CORESET, or a number of resources of the CORESET.
 28. The base station of claim 26, wherein the one or more processors are further configured to: transmit an indication of the aggregation level threshold based at least in part on one or more of: a search space configuration, radio resource control signaling, a downlink control information message, or one or more medium access control control elements.
 29. The base station of claim 26, wherein the one or more processors are further configured to: transmit an indication of the aggregation level threshold based at least in part on one or more of an implicit indication or an explicit indication of the aggregation level threshold.
 30. The base station of claim 24, wherein a first PDCCH candidate, of the first subset of PDCCH candidates, comprises a first set of control channel elements of a first PDCCH monitoring occasion, and wherein a second PDCCH candidate, of the second subset of PDCCH candidates, comprises the first set of control channel elements of the first PDCCH monitoring occasion and a second set of control channel elements of a second PDCCH monitoring occasion. 